Balancing a game is very difficult. There are so many variables to consider to ensure that all 'builds' are viable and will be enjoyable to play. With that, there are times that one play style will be better than another. I feel that Dark Souls isn't too bad if you just dump things into Health and Strength, allowing you to mow down enemies and bosses with ease. There is no real answer to 'How do you balance a game?' Which can be annoying, since many games suffer from some bad balancing even in a small area.